阅读说明：本技术 一种污水深度处理装置 (Advanced sewage treatment device ) 是由 张耀宗 杨永 严珊 张宁 高群丽 张旺 李丽萍 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种污水深度处理装置,包括抽吸泵以及并排设置的电絮凝装置和臭氧—平板陶瓷膜过滤装置,电絮凝装置包括絮凝槽及设置在絮凝槽内的阳极极板组、阴极极板组和污泥沉淀单元；阳极极板组和阴极极板组分别连接电源的正负极,与电源构成回路；污泥沉淀单元设置在絮凝槽底部,用于收集产生的沉淀；絮凝槽远离臭氧--平板陶瓷膜过滤装置一侧的槽壁下部开有进水口；絮凝槽靠近臭氧--平板陶瓷膜过滤装置一侧的槽壁上端设有导流管道；臭氧--平板陶瓷膜过滤装置用于向水中鼓入臭氧、通过曝气对水进行处理并通过平板膜对水进行过滤；抽吸泵用于将平板膜过滤后的水抽出。该装置能够较好地去除水中的悬浮物、TP、氨氮、浊度、色度,保障出水中细菌达标。(The invention discloses a sewage advanced treatment device, which comprises a suction pump, an electric flocculation device and an ozone-flat ceramic membrane filtering device, wherein the electric flocculation device and the ozone-flat ceramic membrane filtering device are arranged side by side; the anode plate group and the cathode plate group are respectively connected with the anode and the cathode of the power supply and form a loop with the power supply; the sludge settling unit is arranged at the bottom of the flocculation tank and is used for collecting generated sediment; the lower part of the tank wall at one side of the flocculation tank, which is far away from the ozone-flat ceramic membrane filtering device, is provided with a water inlet; the upper end of the tank wall of the flocculation tank close to one side of the ozone-flat ceramic membrane filtering device is provided with a flow guide pipeline; the ozone-flat ceramic membrane filtering device is used for blowing ozone into water, treating the water through aeration and filtering the water through a flat membrane; the suction pump is used for pumping out the water filtered by the flat membrane. The device can get rid of suspended solid, TP, ammonia nitrogen, turbidity, colourity in the aquatic betterly, ensures that the aquatic bacterium is up to standard.)

1. The utility model provides a sewage advanced treatment unit which characterized in that: comprises a suction pump (38), an electric flocculation device and an ozone-flat ceramic membrane filtering device which are arranged side by side,

the electric flocculation device comprises a flocculation tank (11), and an anode plate group (21), a cathode plate group (22) and a sludge precipitation unit which are arranged in the flocculation tank (11), wherein the anode plate group (21) and the cathode plate group (22) are respectively connected with a positive electrode and a negative electrode of a power supply, and metal cations generated by electrolysis and metal cations in waterOH^-Carrying out polymerization reaction to generate floc with strong adsorption capacity, and forming precipitate together with suspended substances and colloidal substances in water through the action of electric neutralization and net catching; the sludge settling unit is arranged at the bottom of the flocculation tank (11) and is used for collecting the sediments;

a water inlet (12) is formed in the lower part of the tank wall of the flocculation tank (11) at one side far away from the ozone-flat ceramic membrane filtering device and is used for introducing sewage; a flow guide pipeline (31) is arranged at the upper end of the tank wall of the flocculation tank (11) close to one side of the ozone-flat ceramic membrane filtering device and is used for introducing water subjected to flocculation precipitation into the ozone-flat ceramic membrane filtering device;

the ozone-flat ceramic membrane filter device is used for blowing ozone into water, treating the water through aeration and filtering the water through a flat membrane 33;

the suction pump (38) is connected with the flat membrane (33) through a pipeline (37) and is used for pumping out the water filtered by the flat membrane (33).

2. The advanced wastewater treatment plant according to claim 1, characterized in that: the anode electrode plate group (21) comprises a flat electrode (21b) and a plurality of corrugated plate electrodes (21a) which are vertically and parallelly arranged, the tops of the flat electrode (21b) and the corrugated plate electrodes (21a) are connected through a plurality of insulating connecting rods (21c) and are suspended on the upper part of the flocculation tank (11) through the connecting rods (21c), and the flat electrode (21b) is in insulating connection with the inner wall of one side, away from the ozone-flat ceramic membrane filtering device, of the flocculation tank (11);

the cathode electrode plate group (22) comprises a flat electrode (22b) and a plurality of corrugated plate electrodes (22a) which are vertically and parallelly arranged, the bottoms of the flat electrode (22b) and the corrugated plate electrodes (22a) are connected through a plurality of insulating connecting rods (22c) and are arranged at the lower part of the flocculation tank (11) through the connecting rods (22c), and the flat electrode (22b) is in insulating connection with the inner wall of the other side of the flocculation tank (11);

corrugated plate electrodes of the anode electrode plate group (21) and the cathode electrode plate group (22) are arranged in an inserting mode and are not in contact with each other, end faces of two sides of the corrugated plate electrodes and the end faces of two sides of the flat plate electrodes are in insulation connection with the wall surface of the flocculation tank (11), and the upper space of the flocculation tank (11) is divided into a plurality of chambers with communicated tops or bottoms;

a water inlet (12) is arranged at the lower part of the tank wall at one side of the flocculation tank (11) far away from the ozone-flat ceramic membrane filtering device; the upper end of the tank wall of the flocculation tank (11) close to one side of the ozone-flat ceramic membrane filtering device is provided with a flow guide pipeline (31) for introducing water subjected to flocculation precipitation into the ozone-flat ceramic membrane filtering device.

3. The advanced wastewater treatment plant according to claim 1, characterized in that: the ozone-flat ceramic membrane filtering device comprises a filtering tank (34), a flat membrane (33), an aeration pipeline (35) and aeration discs (36), wherein the flat membrane (33) is arranged in the filtering tank (34) and above the aeration discs (36), the aeration pipeline (35) extends into the bottom of the filtering tank (34) and is used for conveying ozone into the filtering tank (34), and a plurality of aeration discs (36) are arranged on the aeration pipeline (35).

4. The advanced wastewater treatment plant according to claim 1, characterized in that: the flat membrane is a flat ceramic membrane.

5. The advanced wastewater treatment plant according to claim 1, characterized in that: the anode plate group (21) is made of aluminum, iron or aluminum-iron alloy; the cathode plate group is made of Ti/RuO₂And (4) preparing.

6. The advanced wastewater treatment plant according to claim 1, characterized in that: the corrugated plate electrodes of the anode plate group (21) and the cathode plate group (22) are identical-wave plates or different-wave plates.

7. The advanced wastewater treatment plant according to claim 1, characterized in that: the sludge hopper (14) is in a V-shaped groove shape.

8. The advanced wastewater treatment plant according to claim 1, characterized in that: the projection distance of the adjacent corrugated plate electrodes (21a) and (22a) is 1-3cm, and the angle of the folding angle of the corrugated plate electrodes is 90 degrees.

9. The advanced wastewater treatment plant according to claim 1, characterized in that: the distance between the flat plate electrode (21b or 22b) and the adjacent corrugated plate electrode (22a or 21a) is 2-3 cm.

10. The advanced wastewater treatment plant according to claim 1, characterized in that: the flocculation tank (11) is made of an electrically insulating material.

Technical Field

The invention relates to the field of advanced sewage treatment, in particular to an advanced sewage treatment device for removing phosphorus, COD (chemical oxygen demand) and turbidity and meeting the requirements of bacteria in effluent.

Technical Field

With the gradual progress of society, the requirements of people on living level and living environment are gradually increased. Particularly in recent years, the comprehensive treatment strength of the country to the water environment is gradually increased, so that the water environment is obviously improved. In the domestic sewage treatment process, the original effluent standard of a sewage treatment plant is improved from primary B in discharge Standard of pollutants for municipal wastewater treatment plant (GB8918-2002) to primary A. With the stricter comprehensive environmental regulation and the stricter requirements on the water environment in China, the indexes are improved from the original first class A to class four (discharge standard of pollutants in water of municipal wastewater treatment plants (DB11/890-2012)), and the standard requirements in some places are stricter. The existing sewage treatment plants in large and medium-sized cities are basically saturated and mainly face the problem of upgrading and modifying for advanced treatment, while small-sized sewage treatment plants or sewage treatment stations also face certain problems in the aspects of ensuring the effectiveness and the long-term property of the effluent water quality or improving the water quality indexes, and mainly the relevant indexes of COD (chemical oxygen demand), ammonia nitrogen, chromaticity, Total Phosphorus (TP) and the like of the effluent water do not reach the standard.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the sewage advanced treatment device which can effectively ensure that the quality of the effluent water is stable and reaches the standard.

Therefore, the invention adopts the following technical scheme:

the utility model provides a sewage advanced treatment unit, includes suction pump and electric flocculation device and ozone-dull and stereotyped ceramic membrane filter equipment that set up side by side, electric flocculation device includes flocculation tank and sets up anodal polar plate group, negative pole polar plate group and the sludge settling unit in the flocculation tank, positive poleThe electrode plate group and the cathode electrode plate group are respectively connected with the positive electrode and the negative electrode of a power supply to form a loop with the power supply, and metal cations generated by electrolysis and OH in water^-Carrying out polymerization reaction to generate floc with strong adsorption capacity, and forming precipitate with impurities in water through the action of electric neutralization and net catching; the sludge settling unit is arranged at the bottom of the flocculation tank and is used for collecting the sediment; a water inlet is formed in the lower part of the tank wall at one side of the flocculation tank, which is far away from the ozone-flat ceramic membrane filtering device, and is used for introducing sewage; a flow guide pipeline is arranged at the upper end of the tank wall of one side of the flocculation tank close to the ozone-flat ceramic membrane filtering device and is used for introducing flocculated water into the ozone-flat ceramic membrane filtering device; the ozone-flat ceramic membrane filtering device is used for blowing ozone into water, treating the water through aeration and filtering the water through a flat membrane; the suction pump is connected with the flat membrane through a pipeline and is used for pumping out the water filtered by the flat membrane.

The anode plate group comprises a flat plate electrode and a plurality of corrugated plate electrodes which are vertically and parallelly arranged, the tops of the flat plate electrode and the corrugated plate electrodes are connected through a plurality of insulated connecting rods and are mounted on the upper part of the flocculation tank in a suspended mode through the connecting rods, and the flat plate electrode is connected with the inner wall of one side, away from the ozone-flat ceramic membrane filtering device, of the flocculation tank in an insulated mode;

the cathode electrode plate group comprises a flat electrode and a plurality of corrugated plate electrodes which are vertically and parallelly arranged, the bottoms of the flat electrode and the corrugated plate electrodes are connected through a plurality of insulating connecting rods and are arranged at the lower part of the flocculation tank through the connecting rods, and the flat electrode is in insulating connection with the inner wall at the other side of the flocculation tank;

the corrugated plate electrodes of the anode electrode plate group and the cathode electrode plate group are arranged in an inserting mode and are not in contact with each other, the end faces of the two sides of each of the corrugated plate electrodes and the end faces of the two sides of each of the corrugated plate electrodes are in insulation connection with the wall surface of the flocculation tank, and the upper space of the flocculation tank is divided into a plurality of chambers with the tops or the bottoms communicated with each other;

a water inlet is arranged at the lower part of the tank wall at one side of the flocculation tank, which is far away from the ozone-flat ceramic membrane filtering device; a flow guide pipeline is arranged at the upper end of the tank wall at one side of the flocculation tank close to the ozone-flat ceramic membrane filtering device and is used for introducing flocculated water into the ozone-flat ceramic membrane filtering device.

The ozone-flat ceramic membrane filtering device comprises a filtering tank, a flat membrane, an aeration pipeline and an aeration disc, wherein the flat membrane is arranged in the filtering tank and above the aeration disc; the aeration pipeline extends into the bottom of the filter tank and is used for conveying ozone to the filter tank; a plurality of aeration discs are arranged on the aeration pipeline 35.

Preferably, the flat membrane is a flat ceramic membrane; the anode plate group is made of aluminum, iron or aluminum-iron alloy; the cathode plate group is made of Ti/RuO₂And (4) preparing. The corrugated plate electrodes of the anode plate group and the cathode plate group can be same-wave polar plates or different-wave polar plates.

In one embodiment of the invention, the sludge hopper is in a V-groove shape; the projection distance of two adjacent corrugated plate electrodes is 1-3cm, and the angle of the folded angle of the corrugated plate electrodes is 90 degrees; the distance between the flat plate electrode and the adjacent corrugated plate electrode is 2-3 cm.

For safety reasons, the flocculation vat is preferably made of an electrically insulating material.

The invention has the following beneficial effects:

1. the sewage advanced treatment device can well remove suspended matters, TP, ammonia nitrogen, turbidity and chromaticity in water and ensure that bacteria in the water reach the standard;

2. in the device, an anode plate and a cathode plate are made into same-wave or different-wave plates, and play a role in accelerating flocculation and precipitation in the electrolysis process due to the change of flow velocity;

3. the water treated by the electric flocculation device contains partial aluminum ions and iron ions for flocculation and precipitation, a small amount of aluminum ions and iron ions enter the membrane pool, ozone is introduced into the membrane pool, and the ozone generates OH (hydroxyl radical) under the catalysis of the iron ions and the aluminum ions to further oxidize reducing substances in the water, so that the pollution of a flat membrane can be effectively reduced, the filtration period is prolonged, and the quality of the effluent is effectively ensured.

Drawings

FIG. 1 is a front perspective view of an advanced wastewater treatment apparatus according to the present invention;

FIG. 2 is a schematic top view of the sewage advanced treatment apparatus according to the present invention;

FIG. 3 is a schematic structural view of the anode plate assembly of FIG. 1;

FIG. 4 is a schematic view of the structure of the cathode plate assembly of FIG. 1;

fig. 5 is a schematic top view of the cathode plate assembly of fig. 4.

In the figure:

11. flocculation tank 12, water inlet 13, baffle 14, sludge bucket 15, sludge discharge pipeline

21. Anode plate group 22, cathode plate group 31, flow guide pipeline 32, air bubble 33 and flat membrane

34. A filter tank 35, an aeration pipeline 36, an aeration disc 37, a pipeline 38 and a suction pump

Detailed Description

The structure of the sewage advanced treatment apparatus of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, the advanced wastewater treatment apparatus of the present invention comprises a suction pump 38, and an electric flocculation apparatus and an ozone-flat ceramic membrane filtration apparatus which are arranged side by side. In the embodiment shown in the figure, the electroflocculation unit is located on the left side and the ozone-flat ceramic membrane filtration unit is located on the right side.

The electric flocculation device comprises: a flocculation tank 11, and an anode electrode plate group 21, a cathode electrode plate group 22 and a sludge precipitation unit which are arranged in the flocculation tank 11.

The flocculation tank 11 is made of non-conductive materials and has the characteristics of corrosion resistance and high strength.

The sludge precipitation unit is arranged at the bottom of the flocculation tank 11, the periphery of the sludge precipitation unit is hermetically connected with the flocculation tank 11, and the flocculation tank 11 is divided into an upper space and a bottom space which are not communicated with each other. The sludge precipitation unit consists of a plurality of sludge hoppers 14 and partition plates 13, and the plurality of sludge hoppers 14 are arranged side by side and are connected in sequence; the partition plate 13 is horizontally arranged on one side far away from the ozone-flat ceramic membrane filtering device and is connected with an adjacent sludge hopper. The bottom of each sludge hopper 14 is respectively connected with a sludge discharge pipeline 15, and a valve is arranged on the sludge discharge pipeline 15.

The structures of the anode plate group 21 and the cathode plate group 22 are shown in fig. 3 to 5. The anode plate group 21 comprises a flat plate electrode 21b and a plurality of corrugated plate electrodes 21a which are vertically and parallelly arranged, the tops of the flat plate electrode 21b and the corrugated plate electrodes 21a are connected through a plurality of insulating connecting rods 21c and are mounted on the upper portion of the flocculation tank 11 in a suspension mode through the connecting rods 21c, and the flat plate electrode 21b is far away from the flocculation tank 11 and is connected with the inner wall of one side of the ozone-flat ceramic membrane filtering device in an insulating mode. The cathode plate group 22 comprises a flat plate electrode 22b and a plurality of corrugated plate electrodes 22a which are vertically and parallelly arranged, the bottoms of the flat plate electrode 22b and the plurality of corrugated plate electrodes 22a are connected through a plurality of insulating connecting rods 22c and are arranged at the lower part of the flocculation tank 11 through the connecting rods 22c, and the flat plate electrode 22b is connected with the inner wall of the other side of the flocculation tank 11 in an insulating way. The corrugated plate electrodes of the anode electrode plate group 21 and the cathode electrode plate group 22 are arranged in an inserting mode and are not in contact with each other, the end faces of the two sides of the corrugated plate electrodes and the end faces of the two sides of the plate electrodes are connected with the wall surface of the flocculation tank 11 in an insulating mode, and the upper space of the flocculation tank 11 is divided into a plurality of cavities communicated with the top or the bottom. Each polar plate of the anode polar plate group is connected with the positive pole of the power supply, and each polar plate of the cathode polar plate group is connected with the negative pole of the power supply and forms a loop with the power supply.

A water inlet 12 is arranged at the lower part of the tank wall at one side of the flocculation tank 11 far away from the ozone-flat ceramic membrane filtering device; a flow guide pipeline 31 is arranged at the upper end of the tank wall of the flocculation tank 11 close to one side of the ozone-flat ceramic membrane filtering device and is used for introducing flocculated water into the ozone-flat ceramic membrane filtering device.

The ozone-flat ceramic membrane filtering device comprises: a filter tank 34, a flat membrane 33, an aeration pipeline 35 and an aeration disc 36. The flat membrane 33 is arranged in the filter tank 34, and the aeration pipeline 35 extends into the bottom of the filter tank 34 and is used for conveying ozone into the filter tank 34; a plurality of aeration disks 36 are provided on the aeration pipe 35. The flat membrane 33 is arranged above the aeration disc 36, and the flat membrane 33 is preferably a flat ceramic membrane.

The suction pump 38 is connected to the flat membrane 33 via a pipe 37, and is used for pumping out the water filtered by the flat membrane 33.

The anode plate group 21 can be made of aluminum or iron, and is preferably made of aluminum-iron alloy; the cathode plate group can be formed by Ti/RuO₂Ti, stainless steel, Pt or carbon plate, preferably Ti/RuO₂(titanium ruthenium alloy); the corrugated plate electrodes of the anode plate group 21 and the cathode plate group 22 are identical wave plates or different wave plates (different waves are opposite in wave crest and opposite in wave trough to form staggered arrangement; identical waves are opposite in wave crest and wave trough to form staggered arrangement).

In the embodiment shown in fig. 1, the sludge hopper 14 is in a V-groove shape, the projection distance d between the adjacent corrugated plate electrodes 21a and 22a is 1-3cm, preferably 2cm, and the excessive distance increases the resistance and consumes large power; if the distance is too close, the distance is too small, and the water passing resistance is increased. In addition, the distance between the flat plate electrode 21b and the adjacent corrugated plate electrode 22a, and the distance between the flat plate electrode 22b and the adjacent corrugated plate electrode 21a are 2 to 3 cm. In the same-wave polar plate, the angle of the break angle of each polar plate is 90 degrees, the length and the height of the polar plate are mainly adjusted by the size of the treated water quantity, the retention time is mainly met, and the length of the retention time is determined by the concentration of impurities needing to be removed in the water quality of the inlet water and the removal degree needed.

The process and mechanism of the device for treating sewage are as follows:

referring to fig. 1 and 2, the sewage to be treated enters the flocculation tank 11 from the bottom water inlet 12, the water flow rises along the gap between the corrugated plate electrodes of the leftmost flat plate electrode, turns back after reaching the top, falls along the gap between the two corrugated plate electrodes, and repeatedly rises-falls-rises-falls, so that the sewage flows along the serpentine channel in a propelling manner. Referring to fig. 2, the black solid points in the figure indicate that the water flows from bottom to top, the x points indicate that the water flows from top to bottom, and the whole flow direction is a plug flow type.

Taking the anode plate group 21 as an aluminum plate as an example, since the anode plate group is connected with the positive electrode of the power supply, the anode plate undergoes an oxidation reaction to release Al under the action of an applied current in the flowing process of the sewage³⁺With OH in water^-Polymerization reaction is carried out to generate Al (OH) with strong adsorption capacityⁿ⁺Floc, suspended substance and colloidal substance in the adhesion aquatic, begin to form less floc, under the impetus of rivers, because every dog-ear of different ripples (or with ripples) folded plate passageway is 90, rivers up-and-down motion simultaneously, can increase the collision probability of aquatic floc like this, make the floc grow gradually of aquatic, simultaneously because fluidic flow direction constantly changes, produce on the surface of negative and positive pole polar plate and erode, the at utmost has alleviateed the concentration polarization phenomenon that produces at the electrolysis in-process, make Al³⁺The ions are uniformly distributed in the water. The settling velocity gradually increases as the flocs become larger, so that a part of the flocs can settle into the sludge hopper 14 at the bottom of the tank. The deposited flocs can be discharged in the form of sludge through a sludge discharge pipe 15.

The water treated by the flocculation tank 11 contains a part of Al³⁺It has a certain catalytic action on ozone. The treated water flows into the ozone-flat membrane treatment unit through the diversion pipeline 31. Ozone produced by an ozone generator (not shown) is delivered to the bottom of the ozone-flat membrane treatment unit through an aeration pipe 35, and is aerated through a titanium alloy aeration disk 36 at the bottom. In Al³⁺Under the catalytic action of the ozone, COD, ammonia, nitrogen and chromaticity in water can be further removed, and simultaneously, the water in the filter tank 34 can be further stirred, so that the thickness of a filter cake layer of the flat membrane 33 is effectively reduced, and the pollution to the flat membrane 33 is delayed. In normal operation, the pump 38 pumps the flat membrane 33 through the pipe 37, so that the flat membrane 33 produces water. The introduction of ozone can further oxidize organic matters adsorbed on the flat membrane, thereby reducing the pollution of pollutants to the flat membrane.

In addition, pretreatment equipment, including settling, desanding, biochemical or other suitable equipment, can be added before the device of the invention as required.

At a current density of 9mA/cm²And the water quality of inlet and outlet water of the device is measured through experiments under the condition that the distance between the polar plates is 2cm as follows:

water sample	COD	TP	Ammonia nitrogen	Color intensity
					Inflow (mg/L)	50	2.5	8	64
Water outlet (mg/L)	15	0.1	0	4

According to the detection results, the device disclosed by the invention can effectively reduce TP, ammonia nitrogen and COD in the sewage, and can effectively reduce the chromaticity of the sewage.